<!--
 * @Descripttion: 
 * @version: 
 * @Author: wtzhang
 * @Date: 2021-09-23 10:23:04
 * @LastEditors: wtzhang
 * @LastEditTime: 2021-09-23 10:27:26
-->
<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<style>
  div {
    height: 200px;
  }
  #left {
    background-color: blueviolet;
  }

  #center {
    background-color: cadetblue;
  }

  #right {
    background-color: coral;
  }
  #left {
    float: left;
  }
  #right {
    float: right;
  }
  #left, #right {
    width: 300px;
  }
  #center {
    margin-left: 300px;
    margin-right: 300px;
  }
</style>

<body>
  <div id="left"></div>
  <!-- <div id="center"></div> -->
  <div id="right"></div>
  <div id="center"></div>
</body>
</html>